src/app/MessageDef/ListParser.cpp

/**
 *
 *    Copyright (c) 2020 Project CHIP Authors
 *    Copyright (c) 2018 Google LLC.
 *    Copyright (c) 2016-2017 Nest Labs, Inc.
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
/**
 *    @file
 *     This file defines List parser in CHIP interaction model
 *
 */

#include "ListParser.h"

#include <inttypes.h>
#include <stdarg.h>
#include <stdio.h>

using namespace chip;
using namespace chip::TLV;

namespace chip {
namespace app {
ListParser::ListParser() {}

CHIP_ERROR ListParser::Init(const chip::TLV::TLVReader & aReader)
{
    CHIP_ERROR err = CHIP_NO_ERROR;

    // make a copy of the reader here
    mReader.Init(aReader);

    VerifyOrExit(chip::TLV::kTLVType_Array == mReader.GetType(), err = CHIP_ERROR_WRONG_TLV_TYPE);

    // This is just a dummy, as we're not going to exit this container ever
    chip::TLV::TLVType OuterContainerType;
    err = mReader.EnterContainer(OuterContainerType);

exit:
    ChipLogFunctError(err);

    return err;
}

CHIP_ERROR ListParser::InitIfPresent(const chip::TLV::TLVReader & aReader, const uint8_t aContextTagToFind)
{
    CHIP_ERROR err = CHIP_NO_ERROR;
    chip::TLV::TLVReader reader;

    err = mReader.FindElementWithTag(chip::TLV::ContextTag(aContextTagToFind), reader);
    SuccessOrExit(err);

    err = Init(reader);
    SuccessOrExit(err);

exit:
    ChipLogIfFalse((CHIP_NO_ERROR == err) || (CHIP_END_OF_TLV == err));

    return err;
}

CHIP_ERROR ListParser::Next()
{
    CHIP_ERROR err = mReader.Next();

    ChipLogIfFalse((CHIP_NO_ERROR == err) || (CHIP_END_OF_TLV == err));

    return err;
}
}; // namespace app
}; // namespace chip